我不断收到缩进错误，我不应该这样

Question

每当我在 CMD 中运行我的程序时，都会出现缩进错误。对我来说，整个程序的缩进看起来很完美，所以我完全不知道为什么会收到错误。

CMD 错误：

        scraper9.py", line 50
            browser.get(url2)
            ^
        IndentationError: unexpected unindent

我已完全删除所有缩进并重新缩进一行以到达当前迭代，但我仍然出错。

导入操作系统 导入系统 导入 csv 从 bs4 导入 BeautifulSoup 导入 urllib2 导入 xlsxwriter 从硒导入网络驱动程序

            reload(sys)
            sys.setdefaultencoding("utf8")

            key_stats_on_main = ["Market Cap", "PE Ratio (TTM)"]
            key_stats_on_stat = ["Enterprise Value", "Trailing P/E"]

            stocks_arr =[]
            pfolio_file = open("tickers.csv", "r")
            for line in pfolio_file:
                indv_stock_arr = line.strip().split(",")
                stocks_arr.append(indv_stock_arr)

            print(stocks_arr)

            browser = webdriver.PhantomJS()
            stock_info_arr = []

            for stock in stocks_arr:
                stock_info = []
                ticker = stock[0]
                stock_info.append(ticker)

                url="https://finance.yahoo.com/quote/{0}?p={0}".format(ticker)
                url2="https://finance.yahoo.com/quote/{0}/key-statistics?p={0}".format(ticker)

                browser.get(url)
                innerHTML = browser.execute_script("return document.body.innerHTML")
                soup = BeautifulSoup(innerHTML, "html.parser")
                for stat in key_stats_on_main:
                    page_stat1 = soup.find(text = stat)
                    try:
                        page_row1 = page_stat1.find_parent("tr")
                        try:
                            page_statnum1 = page_row1.find_all("span")[1].contents[1]
                        except:
                            page_statnum1 = page_row1.find_all("td")[1].contents[0]
                        except:
                            print("Invalid parent for this element")
                            page_statnum1 = "N/A"
                        stock_info.append(page_statnum1)

                browser.get(url2)
                innerHTML2 = browser.execute_script("return document.body.innerHTML2")
                soup2 = BeautifulSoup(innerHTML2, "html.parser")
                for stat in key_stats_on_stat:
                    page_stat2 = soup2.find(text=stat)
                    try:
                        page_row2 = page_stat2.find_parent("tr")
                        try:
                            page_statnum2 = page_row2.find_all("span")[1].contents[0]
                        except:
                            page_statnum2 = page_row2.find_all("td")[1].content[0]
                    except:
                        print("Invalid pareent for this element")
                        page_statnum2 = "N/A"
                    stock_info.append(page_statnum2)

                stock_info_arr.append(stock_info)

            print(stock_info_arr)

            key_stats_on_main.extend(key_stats_on_stat)
            workbook = xlsxwriter.Workbook("Stocks01.xlsx")
            worksheet = workbook.add_worksheet()
            row = 0
            col = 2

            for stat in key_stats_on_main:
                worksheet.write(row, col, stat)
                col +=1

            row = 1
            col = 0
            for our_stock in stock_info_arr:
                col = 0 
                for info_bit in our_stock:
                    worksheet.write(row, col, info_bit)
                    col += 1
                row += 1
            workbook.close()
            print("Script completed")

我希望代码执行时不会出现 Ineation 错误。

它出错了。我很迷茫。

Answer 1

您的try: 缺少except: 或finally:。

            for stat in key_stats_on_main:
                page_stat1 = soup.find(text = stat)
                try:  # <--------------- this one here
                    page_row1 = page_stat1.find_parent("tr")
                    try:
                        page_statnum1 = page_row1.find_all("span")[1].contents[1]
                    except:
                        page_statnum1 = page_row1.find_all("td")[1].contents[0]
                    except:
                        print("Invalid parent for this element")
                        page_statnum1 = "N/A"
                    stock_info.append(page_statnum1)
                      # <---------------- needs something here
            browser.get(url2)

您的意思可能是第二个except: 在第一个try: 的缩进级别上：

            for stat in key_stats_on_main:
                page_stat1 = soup.find(text = stat)
                try:  # <--------------- this one here
                    page_row1 = page_stat1.find_parent("tr")
                    try:
                        page_statnum1 = page_row1.find_all("span")[1].contents[1]
                    except:
                        page_statnum1 = page_row1.find_all("td")[1].contents[0]
                except:
                    print("Invalid parent for this element")
                    page_statnum1 = "N/A"
                stock_info.append(page_statnum1)

            browser.get(url2)

试试看！

顺便说一句，您应该减少try: 子句中的代码大小，并且只捕获您正在处理的异常。在您的情况下，AttributeError（如果.contents 失败）将被第一个except: 捕获。更好：

try:
    found = page_row1.find_all("span")
    index = 1
except XError:  # should be the one .find_all() can raise
    found = page_row1.find_all("td")
    index = 0
page_statnum1 = found[1].contents[index]

外部的try/except也类似。

这样您就不会掩盖您从未打算处理的其他异常。如果你这样做，你将很难弄清楚出了什么问题，所以避免它。